lzo.h 1.5 KB

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  1. #ifndef __LZO_H__
  2. #define __LZO_H__
  3. /*
  4. * LZO Public Kernel Interface
  5. * A mini subset of the LZO real-time data compression library
  6. *
  7. * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
  8. *
  9. * The full LZO package can be found at:
  10. * http://www.oberhumer.com/opensource/lzo/
  11. *
  12. * Changed for kernel use by:
  13. * Nitin Gupta <nitingupta910@gmail.com>
  14. * Richard Purdie <rpurdie@openedhand.com>
  15. */
  16. #define LZO1X_MEM_COMPRESS (16384 * sizeof(unsigned char *))
  17. #define LZO1X_1_MEM_COMPRESS LZO1X_MEM_COMPRESS
  18. #define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
  19. /* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
  20. int lzo1x_1_compress(const unsigned char *src, size_t src_len,
  21. unsigned char *dst, size_t *dst_len, void *wrkmem);
  22. /* safe decompression with overrun testing */
  23. int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
  24. unsigned char *dst, size_t *dst_len);
  25. /* decompress lzop format */
  26. int lzop_decompress(const unsigned char *src, size_t src_len,
  27. unsigned char *dst, size_t *dst_len);
  28. /* check if the header is valid (based on magic numbers) */
  29. bool lzop_is_valid_header(const unsigned char *src);
  30. /*
  31. * Return values (< 0 = Error)
  32. */
  33. #define LZO_E_OK 0
  34. #define LZO_E_ERROR (-1)
  35. #define LZO_E_OUT_OF_MEMORY (-2)
  36. #define LZO_E_NOT_COMPRESSIBLE (-3)
  37. #define LZO_E_INPUT_OVERRUN (-4)
  38. #define LZO_E_OUTPUT_OVERRUN (-5)
  39. #define LZO_E_LOOKBEHIND_OVERRUN (-6)
  40. #define LZO_E_EOF_NOT_FOUND (-7)
  41. #define LZO_E_INPUT_NOT_CONSUMED (-8)
  42. #define LZO_E_NOT_YET_IMPLEMENTED (-9)
  43. #endif